Which of the following is NOT a common type of rigging hardware?

Fasteners are not typically categorized as a common type of rigging hardware. Rigging hardware primarily includes components specifically designed for lifting and hoisting operations, such as shackles, slings, and pulleys. Shackles are used to connect various rigging components and ensure secure lifting conditions. Slings, often made from synthetic materials or wire rope, are the means by which loads are lifted. Pulleys serve to change the direction of the force applied and can help multiply the lifting capability.

Fasteners, while essential in many construction and assembly tasks, are generally utilized to hold parts together rather than to facilitate lifting or load movement. They are not specifically designed for the unique requirements of rigging operations, which focus on safety, load distribution, and securing loads during lifting.